7 Pin Trailer Plug Tester & 4 Pin Trailer Tester with Double-Sided LED Indicators, Trailer Light Tester for Boat Trailer RV Truck Camper, Not Suitable for Vehicle with Lamp Out Sensor

2-in-1
Design: This trailer wiring tester combines both a 4-pin flat and an RV blade 7-pin trailer light tester, allowing you to test both the 4-pin and 7-pin trailer connectors.
Note: This trailer tester does NOT function with vehicles equipped with a lamp-out sensor.
Upgraded Double-Sided LED Indicators: The 4-pin and 7-pin trailer circuit tester is designed with LEDs on both sides, unlike other testers that only have LEDs on one side, which can be difficult to read. It is a useful tool to help troubleshoot issues or verify that you have installed or repaired your trailer plug correctly.
6 Light Functions: This versatile trailer connector tester can be used to test 6 separate trailer light functions, quickly confirming the functionality of taillights, brake lights, reverse lights, turn signals, electric trailer brakes, and 12V auxiliary power on your vehicle.
Bright LED Indicators: The trailer hitch tester is equipped with an LED light for each electrical function. By plugging in the light tester and checking, you can easily read the green LEDs and identify which wiring has an issue.
Durable Construction: For extended use, this 7-blade RV trailer tester is constructed from durable ABS plastic, which will not rust or corrode. Tin-plated copper terminals ensure excellent conductivity.
Simple to Use: No batteries or wiring are required. The 7-blade and 4-pin tester is simple to use, with an ergonomic design for convenient plugging in or unplugging. It is widely used to test trailer light circuits on most trucks, boats, trailers, campers, caravans, food vans, and other towed vehicles